Motion transmission system



y June 11,1940. wuNscH- 2,204,460

HOTION TRANSMISSIOHSYSTEM Filed July 50,1937

Patented June 11, 1940 UNITEDl STATES MGTION TRANSMISSION SYSTEM Guido Wnsch, Berlin-Steglitz, Germany, assignor to Askania-Werke A. G., a corporation of Germany Application July so, 1937, serial No. 156,573 In Germany August 1, 1936 7 Claims.

This invention relates -to motion transmission systems.

It is an object of this invention to provide a simple and reliable apparatus for -converting a relatively weak rotary impulse, such as exerted -by a pointer of a measuring instrument into a relatively strong rotary movement suitable for operating control mechanisms and the like.

It is a further'objcct of this invention to provide an instrument by which even sudden rotary movements are correctly reproduced without the loss of one or several revolutions which sometimes occur in conventional repeater systems when a motion repeating .element of relatively great inertia is not able simultaneously to follow quick movements introduced into the instrument.

Further alms, objects and advantages of this invention will appear from a consideration of 0 the description 'which follows with the accompanying drawing showing for purely illustrative purposes an embodiment of this invention. It is to be understood, however, that the description is not to be taken in a limiting sense, the

pended claims.

Referring to the drawing: l

Fig. 1 is a sectional sight elevation of an eming a primary element of a first pressure fluid relay. i In the illustrated example a Apressure -fluid relay of the well known Askania jet-pipe type is shown. The relay includes a movable jet-pipe Il having a hub l2v and mounted for full rotation in anti-friction bearings I3 and 44 relatively to a xed support l5. Pressure fluid is supplied to the jet-pipe from a pump diagrammatically shown at I6 through a conduitI I1 terminating into an annular nozzle I8v surrounding the shaft I0 and issuing pressure fluid into a central bore I9 of the hub l2.

The secondary element of the pressure fluid relay is mounted for full rotation coaxially to the primary element. In the illustrated example a piston-shaped orifice member having orifice conduits 2| and 22 is mounted for rotary movement-with a rotatable casing 23, 24 of a motor later to -be described. The orifice member 20 is slidably mounted in a bore 25 of said casing. When pressure fluid enters one or the other of the reception orifices, a pressure is set up inside scope of the invention being defined 'in' the ap- (Cl. 1121-41) A the bore 25 and the piston-shaped orifice member is'moved linto the corresponding extreme position relatively to the casing 23, 24.

A rotary pressure fluid motor shown in the illustrated 'example as being of the slide vane type is used to reproduce the primary motion impulse by turning a power shaft 26 in a. suitable manner, such as by means of gears 21 and 28 actuated by the rotatable part of the motor;

In the illustrated example the 'motor includes a slide vane memberl 29 mounted to be stationary in a support 30 by means ofy a shaft 3| secured thereto. The slidevvane member 'carries in slots the usual slide vanes 32, 33 and 34 form. ing pressure fluid chambers with an excentrically shaped hollow interior space of the motor casing 23, 24. The motor casing is rotatable about the shaft 3l, thus driving the power shaft 26 by means of the gears 21 and 28.

Pressure fluid is supplied to the motor through a conduit 35 terminating in a ring-shaped space 36 of thel support 30 and the casing 24 and thence through a passage 31 and'a pipe 38 to a second pressure fluid relay 39.

The second pressure fluid' relay is shown vin the example as being of the slide valve type admitting pressure fluid from a supply port 40 to control ports 4| and 42 and further controlling exhaust ports 43 and 44. y

The second relay is connected to be actuated by the rst pressure fluid relay, in the example by virtue of its being connected to the orifice member 20 by means of a stem 45. From the control ports 4I and 42 pressure fluid is admitted tothe interior of the casing 24 through the' conduits 46 and 41, respectively.`

-The operation of the motorv will be easily understood from the following explanation referring more particularly to Fig. 2. When the slide valve 39 is moved into the left position, the supply conduit is connected to supply pressure fluid through the conduit 46 into the interior of the motor casing. On the other hand, the conduit 41 communicates with the exhaust' port 44. In case of a rotatably mounted slide vane member 29 pressure fluid enteringl through the conduit 46lwou1d cause the slide vane member with the slide vanes-to move counterclockwisely relatively tothe motor casing 24, while the used pressure fluidis permitted to escape through the conduit 41. Inasmuch as` the slide vane member is mounted to be stationary, it follows that the casing 24 will move relatively to the slide vane memthe power shaft 26.

The operation of the entire device is as follows:

A primary rotary impulse applied to the shaft l0 will displace the jet-pipe relatively to the reception voriiice member 20 in one direction or theV other. The slide valve 39 willthereupon admit pressure fluid through conduits 46 or 41 and cause the motor casing to follow the position ofthe jetpipe. It appears that in this manner the primary mo-tor is exactly reproduced by the movements of the motor-with a force suflicient to operate control mechanisms or the like.

When, caused by a sudden primary impulsethe jet-pipe is moved quickly relatively tothe orice member without the motor being able to follow instantaneously, due to its inertia or the inertia of the device operated by the motor, no movement will be lost, since the second relay, the valve 39, the inertia of which being much less than that of the motor follows immediately the movement of the jet-pipe and remains in the extreme position, causing the motor to turn, untilthe motor casing catches up with the vjet-pipe and the second relay is moved back into its neutral position.

Obviously, the present invention is not restricted to the particular embodiment herein shown and described. Moreover, itis not indispensable that all the features of this invention be used conjointly since they may be used advantageously in various combinations and sub-combinations.

What is claimed is:

1. Motion transmission system comprising, in combination, a rotary pressure fluid motor; a jet-pipe relay including a jet-pipe mounted for vfull rotations about an axis coaxial with the motor and a reception orifice member mounted for full rotations with the motor; a valve controlling the flow of pressure fluid tothe motor; and means controlled by said jet-pipe relay for operating said valve.

2. Motion transmission system comprising, in combination, a jet-pipe relay including a jetpipe mounted for full rotations about an axis and a reception orifice member mounted for full rotations coaxially thereto; a rotary pressure iiuid motor connected to rotate said reception oriiice member; and a slide valve relay mounted for rotation with said motor and actuated by said jetpipe relay for controlling a flow of pressure iiuid.

for actuating said motor, whereby said motor is caused to repeat the movements of said jet-pipe.

3. Motion transmission system comprising, in combination, a slide vane motor including a xed slide vane member and a casing rotatably mounted around said member; a first pressure fluid relay including a primary relay member mounted for full rotations coaxially to said motor casing, and a secondary relay element mounted on said casing to rotate with it; and a second pressure uid relay mounted for rotation with said motor and actuated by said :first relay for controlling a iiow of pressure iluid for actuating said motor, whereby said motor is caused to follow the positions of said primary relay member.

4. Motion transmission system comprising, in combination, a slide vane motor including a xed slide vane member and a casing rotatable relatively thereto; a jet-pipe relay including a jetpipe mounted for full rotations coaxially to said motorcasing, and a reception oriiice member mounted for movement with said motor casing;

and a slide valve relay mounted for rotation with said motor'casing and actuated by said jet-pipe relay for controlling a flow of pressure uid for actuating said motor, whereby said jmotor is caused to repeat the movements of said jet-pipe.

5. Motion transmission system comprising, in combination, a slide vane motor including a fixed slide vane member and a casing rotatable relatively thereto; a jet-pipe relay including a jet-pipe mounted for full rotations coaxially to said motor casing, and a piston-shaped orice member slidably mounted on said motor casing, lsaid oriiice member being arranged to be displaced relatively to said casing in response to the uid pressure set up in its orifices; and a slide valve relay mounted on said casing and connected to be actuated by said orifice member for controlling a ow of pressure iluid for actuatingsaid motor, whereby said motor is caused to repeat the movements of said jet-pipe.

6. Motionl transmission system comprising, in combination a pressure iiuid relay including a primary relay element mounted for full rotations about an axis and a secondary relay element mounted for full rotations coaxially to said rst element; a rotary pressure fluid motor including two parts, a casing and a piston member therein, one of said two parts being rotatably mounted for continuous rotation in either direction; and a second pressure uid relay actated by said iirst relay for controlling a ow of pressure uid for actuating said motor, said secondary relay element of said iirst relay and said second `relay being mounted on said rotatable motor part.

7. Motion transmission system comprising, in combination, a jet-pipe relay including a jetpipe mounted for full rotations about an axis transverse to the direction of the jet and a reception orifice member mounted for full rotations coaxially thereto;` and a rotary pressure uid motor including two parts, a casing and a piston member therein, one of said two parts being rotatably mounted for continuous rotation in either direction, said motor being actuated by a ow of pressure uid controlled by said jet-pipe, said reception orifice member being mounted on said rotatable motor part to follow-up the movement of the jet-pipe.

GUIDO WNscH. 

